A thousand years ago, people from another world brought about their own downfall. They summoned countless heroes who had abilities but no real power and were still beginners, then used them in utterly deranged experiments.
This insane act ultimately created the strongest modified hero. The people from the other world also controlled him with mind-control magic, sending him to defeat the Demon King of that era.
But no one expected that, before dying, the Demon King would break the strongest hero free of the mind control and make him understand everything he had been through.
As a result, the hero went completely mad. A thousand years later, he became the strongest and most vicious Demon King, intent on destroying everything, whether the other world or Earth in his own world.
At this point, Xiao Feng had been chosen as the current hero. With the help of a mysterious person, he gained the ability to reverse summons, avoiding the same tragedy as the previous hero. After learning that the Demon King had destroyed the other world and would lead an army to invade Earth, Xiao Feng immediately reported everything to his country.
"You still want to destroy Earth? Ya shi la lei! You know how terrifying humans on Earth can be, right?!"
An invasion of Earth from another world? Technology versus magic? Planes and tanks battling monsters and magical beasts?
Even more interestingly, before the invasion, the Demon King had planted a spy by Xiao Feng's side.
"I'll show you what it means to be an acting legend!"